class RuboCop::Cop::Style::ParallelAssignment::AssignmentSorter
Helper class necessitated by silly design of TSort prior to Ruby 2.1 Newer versions have a better API, but that doesn't help us
Public Class Methods
new(assignments)
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# File lib/rubocop/cop/style/parallel_assignment.rb, line 104 def initialize(assignments) @assignments = assignments end
Public Instance Methods
accesses?(rhs, lhs)
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`lhs` is an assignment method call like `obj.attr=` or `ary=`. Does `rhs` access the same value which is assigned by `lhs`?
# File lib/rubocop/cop/style/parallel_assignment.rb, line 128 def accesses?(rhs, lhs) if lhs.method_name == :[]= matching_calls(rhs, lhs.receiver, :[]).any? do |args| args == lhs.method_args end else access_method = lhs.method_name.to_s.chop.to_sym matching_calls(rhs, lhs.receiver, access_method).any? end end
tsort_each_child(assignment) { |other| ... }
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# File lib/rubocop/cop/style/parallel_assignment.rb, line 112 def tsort_each_child(assignment) # yield all the assignments which must come after `assignment` # (due to dependencies on the previous value of the assigned var) my_lhs, _my_rhs = *assignment @assignments.each do |other| _other_lhs, other_rhs = *other if ((var = var_name(my_lhs)) && uses_var?(other_rhs, var)) || (my_lhs.asgn_method_call? && accesses?(other_rhs, my_lhs)) yield other end end end
tsort_each_node() { |a| ... }
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# File lib/rubocop/cop/style/parallel_assignment.rb, line 108 def tsort_each_node @assignments.each { |a| yield a } end